Here's an easy project to decorate the walls with your collection of photos for under $20. Print out those Instagrasms or Flickr photos as 3 1/2" x 4" images and use a Polaroid photo template for the full effect...

According to the Photojojo team, they were able to put together a photo ledge display for under $20 using the following:

8′ Piece of Plastic Cap Molding, available at local hardware stores

Adhesive Strips or Sticky Tack

Measuring Tape

Utility Knife

Cutting Surface

Pencil

Instant Photos

We'd recommend using 3M Command Strips, since they won't damage your walls if/when you decide you want to remove or move your display ledges anywhere else. Also, a wall level would be handy to ensure a horizontally level shelf. Otherwise, this seems like an affordable solution for bringing a little wall art into a home office or hallway (imagine it stretching all the way down for 10-12'!) without much DIY skills except measuring and sticking ong the molding.